diff --git a/reference-implementations/dacs-directory/src/catalog/bundlePolicy.ts b/reference-implementations/dacs-directory/src/catalog/bundlePolicy.ts
index 2f1fb58..9a8ce1d 100644
--- a/reference-implementations/dacs-directory/src/catalog/bundlePolicy.ts
+++ b/reference-implementations/dacs-directory/src/catalog/bundlePolicy.ts
@@ -7,6 +7,10 @@ import { bundleSignerPolicy, demosSigningIdentity } from "./bundleSignerPolicy.j
 import { verifyListing } from "./listingVerification.js";
 import type { DealRecord, RegisteredDeal } from "./types.js";
 
+// PAYEE-BOUND COUPLING (issue #17 F2): site (c) of 3 (mirror of evidenceGraph.ts SEPARATORS).
+// No `dacs-payee-bound-agreement:v1:` domain yet. When payee-bound support lands, add it here
+// AND in evidenceGraph.ts, alongside shapeOk's discriminator and isNeutralCancellation's
+// commit-kind. §8.5.1: SELECT the domain from the required discriminator — never strip-and-retry.
 const SEPARATORS: Record<string, string> = {
   "dacs-3-agreement": "dacs-agreement:v1:",
   "dacs-4-evidence": "dacs-evidence:v1:",
diff --git a/reference-implementations/dacs-directory/src/catalog/evidenceGraph.ts b/reference-implementations/dacs-directory/src/catalog/evidenceGraph.ts
index 061ff19..db48d12 100644
--- a/reference-implementations/dacs-directory/src/catalog/evidenceGraph.ts
+++ b/reference-implementations/dacs-directory/src/catalog/evidenceGraph.ts
@@ -38,6 +38,10 @@ const priceTermOk = (value: unknown): boolean => {
   return Boolean(price && /^(?:0|[1-9]\d*)(?:\.\d*[1-9])?$/.test(amount) && /[1-9]/.test(amount) &&
     typeof price.currency === "string" && price.currency.length > 0 && price.currency.length <= 64);
 };
+// PAYEE-BOUND COUPLING (issue #17 F2): site (c) of 3. No `dacs-payee-bound-agreement:v1:`
+// domain yet. When payee-bound support lands, add it here AND in bundlePolicy.ts SEPARATORS,
+// alongside shapeOk's discriminator (above) and isNeutralCancellation's commit-kind
+// (reputation.ts). §8.5.1: SELECT the domain from the required discriminator — never strip-and-retry.
 const SEPARATORS: Record<Exclude<ArtifactKind, "attestation">, string> = {
   agreement: "dacs-agreement:v1:", evidence: "dacs-evidence:v1:", "verify-result": "dacs-verifyresult:v1:",
   composite: "dacs-composite:v1:", rating: "dacs-rating:v1:", listing: "dacs-listing:v1:", bundle: "dacs-bundle:v1:",
@@ -87,6 +91,12 @@ export function isCurrentRef(value: unknown): value is CurrentRef {
   return Boolean(anchor && anchor.kind === "storage-program" && typeof anchor.locator === "string" && /^stor-[0-9a-f]{40}$/.test(anchor.locator) && /^[0-9a-f]{64}$/.test(normalizedHash(ref?.contentHash)));
 }
 function shapeOk(raw: Record<string, unknown>, kind: ArtifactKind): boolean {
+  // PAYEE-BOUND COUPLING (issue #17 F2): site (a) of 3. Today this accepts only
+  // `agreementVersion === "1"`, so a payee-bound agreement ref (#236) fails shape →
+  // bundle never refsVerified → excluded (fail-closed, CORE §11.1.2). When payee-bound
+  // support lands, this discriminator, isNeutralCancellation's commit-kind (reputation.ts
+  // ~L35), and the SEPARATORS domain (below ~L41 + bundlePolicy.ts ~L10) MUST move together
+  // — accept exactly-one of agreementVersion / payeeBoundAgreementVersion (§8.5.1), never both.
   if (kind === "agreement") return raw.agreementVersion === "1" && typeof raw.jobId === "string" && rec(raw.listingRef) !== null && arr(raw.parties).length >= 2 && priceTermOk(rec(raw.terms)?.price);
   if (kind === "evidence") return raw.evidenceVersion === "1" && typeof raw.jobId === "string" && typeof raw.phase === "string" && (raw.outcome === "success" || raw.outcome === "failure") && typeof raw.observedAt === "number" && (raw.amendmentRefs === undefined || Array.isArray(raw.amendmentRefs)) && (raw.attestationRef === undefined || isCurrentRef(raw.attestationRef));
   if (kind === "verify-result") return raw.resultVersion === "1" && typeof raw.scheme === "string" && typeof raw.identifier === "string" && typeof raw.verifiedAt === "number" && ["pass", "fail", "indeterminate", "error"].includes(String(raw.decision)) && isCurrentRef(raw.attestation);
diff --git a/reference-implementations/dacs-directory/src/catalog/reputation.ts b/reference-implementations/dacs-directory/src/catalog/reputation.ts
index 60196e0..56c6ecd 100644
--- a/reference-implementations/dacs-directory/src/catalog/reputation.ts
+++ b/reference-implementations/dacs-directory/src/catalog/reputation.ts
@@ -32,6 +32,11 @@ export function isNeutralCancellation(
     ? listingTerms as Record<string, unknown> : undefined;
   const phases = Array.isArray(phaseSummary) ? phaseSummary.filter((phase): phase is Record<string, unknown> =>
     Boolean(phase && typeof phase === "object" && !Array.isArray(phase))) : [];
+  // PAYEE-BOUND COUPLING (issue #17 F2): site (b) of 3. Only "commit-agreement" is recognized
+  // as commit here. When payee-bound support lands, a session that committed via
+  // "commit-payee-bound-agreement" (#236) must also count as commitReached — otherwise a
+  // post-commit abort mis-scores as ST-10 reputation-neutral. Move this together with shapeOk's
+  // discriminator and the SEPARATORS domain in evidenceGraph.ts / bundlePolicy.ts.
   const commitReached = phases.some((phase) => phase.kind === "commit-agreement" && phase.outcome === "ok");
   return (sellerOutcome === "aborted-by-self" || sellerOutcome === "aborted-by-other") &&
     marker?.claimedPolicy === "pre-commit" && terms?.cancellationPolicy === "pre-commit" && !commitReached;
diff --git a/reference-implementations/dacs-directory/src/components/labels.ts b/reference-implementations/dacs-directory/src/components/labels.ts
index 29ac59a..c365cd3 100644
--- a/reference-implementations/dacs-directory/src/components/labels.ts
+++ b/reference-implementations/dacs-directory/src/components/labels.ts
@@ -2,7 +2,6 @@
 export const RAIL_LABELS: Record<string, string> = {
   "pay-dem": "DEM",
   "pay-x402": "USDC · x402",
-  "pay-evm-erc8183": "ERC-8183",
 };
 export const railLabel = (r: string) => RAIL_LABELS[r] ?? r.replace(/^pay-/, "");
 /** "negotiate-fixed-price" → "fixed price"; acronym ids get proper casing. */